Auger-bit.



No. 835,125. PATBNTBD Nov. 6, 1906.

A. N. WEBB.

y AUGER BIT. APPLICATION FILED OOTA, 1905.

Inventor.

I Attorneys UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Application iiled October 4, 1905. Serial No. 281,322.

Patented Nov. 6, 1906.

To all whom it may concern:

Be it known that I, ARTHUR N. WEBB, a citizen of the United States, residing at Youngsville, in the county of Warren and State of Pennsylvania, have invented a new and useful Auger-Bit, of which the following is a speciiication. j

This invention relates to woodworkingtools, and is designed to provide an improved auger-bit capable of cutting plugs from a piece of timber or other stock. It is also proposed to enable the convenient boring of annular sockets to produce a straight socket centered within the annular socket; to provide for setting the tool so as to limit the cutting action thereof, and thereby gage the depth of the socket; to provide for counterboring the sockets 'to various diameters, and to equip the device with a level to operate as a guide in maintaining the bit in a horizontal position.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accomp anying drawings, and particularly pointed out in the appended claims, it being under- -stood that changes in the form, proportion,

size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a side elevation of a carrier having portions broken away to disclose the construction and assemblage of the auger-bit of the present invention and to show thev mounting of the level. Fig. 2 is a side elevation of the augerbit with the carrier broken away. Fig. 3 is a similar view showing the bit reversed to bring the counterboring elements into operative position. Fig. 4 is a detail perspective view of the drill-bit. Fig. 5 is an enlarged cross-sectional view on the line 5 5 of Fig. 3.

Like characters of reference designate corresponding parts in each and every figure of the drawings.

The bit-carrier 1 of the present invention is of any conventional form and has one end portion 2 made polygonal, so as to fit within the tool-socket of an ordinary brace or within the chuck vof a lathe or similar machine. The other end of the bit-carrier is threaded, as at 3, for a suitable distance, and this threaded portion is intersected by a longitudinal groove or channel 4, which is open at the 4forward end of the stock. As best indicated in Fig. 3 of the drawings, it will be noted that the grooved end of the carrier is annularly beveled and provided with teeth, so as to produce a counterboring element 5.

The auger-bit .6 is tubular and open at opposite ends, so as to be capable of receiving the threaded end of the carrier through either end of the bit, the latter being internally threaded to iit the threaded portion 3 of the carrier. One end of the bit is annularly beveled and toothed, as at 7, topform a counterboring element of a greater diameter than that of the counterboring element 5. Opposite the counterboring end of the auger there are hooked cutting-teeth 8, between which are arranged shorter clearing-teeth 9 to clear out the cuttings produced by the teeth 8. 'A suitable set-screw 10y pierces the tubular bit adjacent the beveled cutting end thereof for engagement with the carrier to rigidly maintain the bit upon the carrier w en the former has been adjusted to any desired position thereon.

For the production of a counterbore of greater diameter than that which can be produced by the counterboring element 7 a collar'11 is slidably embraced upon the bit 6, with one end portion beveled and toothed, as at 12, to form a counterboring element, there being a set-screw 13 piercing the collar for en agement with the tool 6 to adjustably hold the counterboring element thereon.

A pointed drill member 14 is provided with a laterally offset longitudinally disposed shank portion 15, which is adapted to fit in the groove or channel 4 of the bit-carrier. The offset of the stem 15 produces a transverse shoulder 16 at the base of the drill to iit within a socket 17, formed in the forward end of the bit-carrier, whereby the forward pressure of the bit-carrier comes upon the shoulder 16, so as to force the drill into the work.

In practice, the auger-bit and drill being assembled as in Fig. 2, the bit-carrier is rotated in any suitable manner-say by means of a brace or the chuck of a lathe or drillingma chine-whereupon the drill 14 will pro duce a straight socket centered within the annular socket formed by the cutting-teeth 8. It will here be noted that in addition to forming a central socket the 'drill-bit 14 constitutes a'centering-prong for the guidance of the auger-bit. When the central socket is not desired, the drill 14 can of course 'be IOO omitted, and where a straight socket only is desired the auger-bit 6 may be slid inwardly upon the carrier, so as not to engage the work. By omitting the drill 14 the auger-bit may be employed for cutting plugs from a board or other suitable stock.

Vhen boring with the present tool, the depth of the bore may be accurately gaged by means of the stop or gage element 11, which is set at a distance from the boring end of the tool 6 corresponding to the depth of the socket to be bored, whereby the stop or gage will engage the face of the work and stop the cutting of the auger at the desired depth.

To counterbore the socket produced by the tubular bit, it is merely necessary to withdraw the bit upon the carrier until the counterboring element is exposed for operation. If a larger counterbore is desired, the tubular bit 6 is removed and then replaced in a reverse position, so as to bring its counterboring element 7 at the front of the carrier and in advance of the counterboring element 5. If a still larger counterbore is desired, the element 11 is adjusted forwardly until its counterbored portion 12 projects beyond the counterboring portion 7 It is proposed to equip the bit-carrier with a suitable spirit-level 1S for the purpose of leveling the carrier within the chuck of a lathe or boring-machine preparatory to the operation thereof.

Frein the foregoing description it will be understood that the implement of the present invention is exceedingly simple and at the same time effective for the purpose designed. Its parts are comparatively few in number, compactly assembled upon the bit-carrier, and arranged for convenient adjustment so as to accommodate the implement to the different characters of work for which it has been designed.

1t is proposed to provide for smoothing out the opening or socket produced by the bit, and this feature is accomplished by means of a cutting-blade 19, applied to the exterior of the bit 6 at one edge of an oblique slot or opening 20, the cutting-blade being provided with a pair of transverse slots 21 for the reception of fastenings 22, whereby the blade may be adjusted with respect to the slot or opening 20.

Having fully described the invention, what is claimed is- 1. A boring implement comprising a carrier provided with a longitudinal seat in one side thereof, a drill-bit having a shank for engagement with the seat of the carrier, and a tubular boring-tool removably embracing the seat portion of the carrier.

2. A boring implement comprising a carrier provided at its forward end with a terminal socket and a longitudinal groove intersecting the socket, a drill-bit having its rear end fitted in the socket and provided with an offset shank portion fitting the groove, and a tubular boring-tool removably embracing the grooved portion of the carrier and retaining the shank of the bit in the groove.

3. A boring-tool comprising a carrier provided at its forward end with an annular se ries of counterboring-teeth, there being a ter minal socket formed in the carrier concentrically with the counterboring-tool and a longitudinal groove intersecting the socket, a reversible tubular boring-tool adj ustably embracing the grooved end of the carrier and provided at one end with boringteeth and at its opposite end with an annular series of counterboring-teeth, a drill-bit seated in the socket of the carrier and provided with a laterallyoii`set longitudinally-disposed shank fitting in the groove of the carrier, and an annular stop element adustably embracing the tubular bit with one end provided with an annular series of counterboring-teeth.

In testimony that I claim the foregoing as my own I have hereto allixed my signature in the presence of two witnesses.

ARTHUR N. VEBB.

Witnesses:

E. L. MORRIS, WVM. H. SHonTT. 

